Feature: Registration
  New users can register with email address and password.
  Email addresses will be validated by an activation mail.

  Scenario: Register
    When I call the API <POST /registration/register> with registration params as request body
    Then I should receive an email message containing an activation link
    When I follow that link
    Then my account should be activated

  Scenario: Register using an existing email address
    Given there is a guy who is registered with the email address 'foo@bar.com'
    When I call the API <POST /registration/register> with registration params as request body
    Then I should be informed with the email collision
